[5] Huang Zhi, Bai Jian, Hou Xiyun. Optics Express, 2012, 20(6): 6085.
[6] Tao Ma, Yu Jingchi, Pei Liang. Optics Express, 2011, 19 (5): 3843.
[8] Lan Yungsung, Lin Chihming. Applied Optics, 2009, 48(18): 3391.
[10] Yang Qinghua, Zhao Baochang, Zhou Renkui. Chinese Optics Letters, 2008, 6(2): 146.